MacBook doesnt reconnect to hidden wifi network after firmware upgrade

Does anyone else have this issue?

I have a hidden wifi network via my airport extreme.
Everytime i close the lid to my macbook for long periods and open it back up my macbook will not reconnect with the network until I manually enter in the network name and password again. I've already set it up to remember the network too.

This has happened once or twice before but it's more constant now with the firmware upgrade.

Any ideas?